Langfuse

Rising

Developer Tools

Visit

Heat Score

7-Day Change

+29

A.R.C. Grade

—

Pricing

freemium

Langfuse is an open-source LLM observability platform that provides traces, evaluations, prompt management, and metrics for monitoring and debugging language model applications.

Open-source LLM observability platform. Traces, evals, prompt management, and metrics in one tool. Self-hostable alternative to LangSmith with a generous free cloud tier.

What the signals say about Langfuse

Langfuse holds a HookFlow heat score of 53/100 in Developer Tools, currently showing a clear upward trajectory in community and search signals. Over the last 7 days its score moved +29 points (up), +14 over 30 days. On the Lock-In Index it scores 100/100 (high lock-in, with significant switching cost).

Heat Score

0–100 viral momentum index combining social buzz, search trends & growth velocity

14-day trend

-7

24h

+29

+14

30d

Computed from 3 live sources in the latest pipeline run — more sources, higher confidence.

Heat Score Breakdown

Creator Buzz (30%)15

Search Interest (25%)92

Community Discussion (20%)2

Growth Momentum (25%)100

What is Langfuse?

Langfuse is an open-source observability platform designed for LLM applications. It consolidates traces, evaluations, prompt management, and metrics into a single tool for monitoring and debugging AI systems.

Is Langfuse self-hostable?

Yes, Langfuse is self-hostable. It also offers a free cloud tier as an alternative to managing your own infrastructure.

How much does Langfuse cost?

Langfuse operates on a freemium pricing model. A generous free cloud tier is available, with paid plans for additional features or usage beyond the free tier limits.

What can you do with Langfuse traces?

Langfuse traces allow you to monitor and observe LLM application behavior. Traces work alongside evaluations, prompt management, and metrics to provide comprehensive observability into your AI systems.

Is Langfuse open source?

Yes, Langfuse is open source and can be self-hosted on your own infrastructure or used via the free cloud tier.

Forecast

Stable

low confidence

Now

→

+7 days

→

+14 days

A.R.C. Score

A.R.C. ratings are calculated for developer infrastructure and API-first tools. This tool hasn't been evaluated yet or falls outside the A.R.C. scope.

🔓Data Lock-In Index

100/ 100

Lower = more portable. 0 = fully open, 100 = maximum lock-in.

✗ Webhooks Out✗ Bulk Export✗ Open Formats

Pricing

freemium

Best For

Teams & Solo